Yeeaah...I don't see it.I don't see how children's films are inherently conservative (depends on what you mean by conservative, too).There's no doubt that Pixar films are conservative by nature though, is there?
I mean, they're children's films after all.
Financially, it just makes sense.
As liberal as most parents claim to be, I'm sure the most liberal straight parents would at the very least feel uncomfortable with a major cartoon that showed gay/lesbian parents.
Hell, I think that the Rugrats movie, where there was an interracial marriage, was probably the most "edgy" a family cartoon can get without drawing offence.
The closest Pixar has come to this is with Nemo, when at the end two different species of "fish" get together to form a family unit.
You look at Cars, where they even gendered the cars... because, you know, only boys race in NASCAR and girls have to be the backup/supporting character. And then there's the whole "let's go back to the 50s when everything was simpler" theme... except, of course, the 50s weren't a great time for everyone - depending on your race/gender.
I mean, I enjoy Pixar movies. Hell, I own all the Pixar Blu-Ray movies. They're fun, simple movies for children and have enough "adult" comedy for the parents/adults who watch them. But I don't think they aren't problematic. But then again, nothing isn't problematic - and that's the point.
On the subject of that Firefly review, that comments section is one of the more disturbing things I've read lately.